h1 {
    text-align: center;
    font-size: 2.5em;
}

body {
    margin-top: 1em;
    margin-bottom: 10em;
    margin-left: 10em;
    margin-right: 10em;
    font-family: Arial, sans-serif;
}

nav {
    text-align: center
}

footer {
    text-align: center;
}